#include <iostream>
#include "stock20.h"

Stock::Stock()
{
    company = "no name";
    shares = 0;
    share_val = 0.0;
    total_val = 0.0;
}

Stock::Stock(const std::string &co, long n, double pr)
{
    company = co;
    if(n < 0)
    {
        std::cout << "Number of shares can't be negative; ";
        std::cout << company << " shares set to 0.\n";
        shares = 0;
    }
    else
        shares = n;
    share_val = pr;
    set_tot();
}

Stock::~Stock()
{
}

void Stock::buy(long num, double price)
{
    if(num < 0)
        std::cout << "Number of shares purchased can't be negative. Transaction is aborted.\n";
    else
    {
        shares += num;
        share_val = price;
        set_tot();
    }
}

void Stock::sell(long num, double price)
{
    using std::cout;
    if(num < 0)
        cout << "Number of shares sold can't be negative. Transaction is aborted.\n";
    else if(num > shares)
        cout << "You can't sell more than you have! Transaction is aborted.\n";
    else
    {
        shares -= num;
        share_val = price;
        set_tot();
    }
}

void Stock::update(double price)
{
    share_val = price;
    set_tot();
}

void Stock::show() const
{
    using std::cout;
    using std::ios_base;
    ios_base::fmtflags orig = cout.setf(ios_base::fixed, ios_base::floatfield);
    std::streamsize prec = cout.precision(3);
    cout << "Company: " << company << "   Shares: " << shares << "\n";
    cout << "   Share Price: $" << share_val;
    cout.precision(2);
    cout << "   Total Worth: $" << total_val << "\n";
    cout.setf(orig, ios_base::floatfield);
    cout.precision(prec);
}
const Stock & Stock::topval(const Stock & s) const
{
    if(s.total_val > total_val)
        return s;
    else
        return *this;
}




